- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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A Novel Modified Robust Load Frequency Control for Mass-Less Inertia Photovoltaics Penetrations via Hybrid PSO-WOA Approach
摘要： The high penetrations of distributed energy resources (DERs) leads to severe problems such as reducing system inertia and increasing the frequency deviations from the nominal value. The main target of this study is to enable modern photovoltaics (PVs) with large penetration amounts to participate effectively in the load frequency control in the interconnected power systems, in which frequency and tie-line power sharing deviations exist. In this research, a model for the solar PV is developed to help study the heavy penetration of the solar PVs within interconnected power systems. Secondly, a time domain objective function based on the norm of the area control error is formulated. Thirdly, in order to tune the PI controllers, a combined meta-heuristic algorithm based on particle swarm optimization and whale optimization algorithm (PSO-WOA) is developed and compared with the individual PSO and WOA controllers. From the studied scenarios, the developed combined scheme outperforms the other algorithms in terms of system performance indices. Therefore, the developed PSO-WOA approach is plausible and straightforward to solve many engineering problems as it benefits from the exploitation characteristics of the conventional PSO and the exploration features of the WOA.
关键词： robust control,frequency deviations (Df),virtual generator,mass-less inertia,load frequency control (LFC),whale optimization algorithm (WOA)
更新于2025-09-23 15:19:57
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Fully decentralized robust backstepping voltage control of photovoltaic systems for DC islanded microgrids based on disturbance observer method
摘要： In this paper, a new backstepping-based nonlinear technique for control of photovoltaic systems in DC islanded microgrids (MGs) is proposed. In contrast to most existing droop/non-droop control strategies that require an exact model of the system including line impedances, loads, other distributed generation units (DGUs) parameters, and even the MG configuration, the proposed method is taking dynamics and uncertainties into account using a designed disturbance observer. Moreover, the proposed method rapidly reaches the reference values and exhibits a more accurate robust performance using local quantities measurement, irrespective of parametric uncertainties, unmodeled dynamics, unknown loads, disturbances, and the number/structure of DGs within the MG. Finally, a low-voltage DC MG is built where the robust performance of the proposed method for different operating conditions including load variation, tracking capability, nonlinear loads, and plug-play of DGs is verified.
关键词： robust control,Backstepping control,disturbance observer,photovoltaic systems,microgrids
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Epitaxial Reflector Structures for High Efficiency Quantum Well Solar Cells
摘要： This paper provides the design and implementation of an L1-optimal control of a quadrotor unmanned aerial vehicle (UAV). The quadrotor UAV is an underactuated rigid body with four propellers that generate forces along the rotor axes. These four forces are used to achieve asymptotic tracking of four outputs, namely the position of the center of mass of the UAV and the heading. With perfect knowledge of plant parameters and no measurement noise, the magnitudes of the errors are shown to exponentially converge to zero. In the case of parametric uncertainty and measurement noise, the controller yields an exponential decrease of the magnitude of the errors in an L1-optimal sense. In other words, the controller is designed so that it minimizes the L∞-gain of the plant with respect to disturbances. The performance of the controller is evaluated in experiments and compared with that of a related robust nonlinear controller in the literature. The experimental data shows that the proposed controller rejects persistent disturbances, which is quanti?ed by a very small magnitude of the mean error.
关键词： unmanned aerial vehicle,optimal control,quadrotor,Robust control,feedback linearization
更新于2025-09-19 17:13:59
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Disturbance observer based robust voltage control of photovoltaic generator interfaced by current mode buck converter
摘要： In this paper, a new control method for photovoltaic generator is presented. The novel method is implemented on photovoltaic generator charging a battery storage system thru buck converter. The controller tasks are re-shaping the buck plant converter, and cancel its right half-pole while keeping tight reference tracking and disturbance rejection. Moreover, the integrated system of generator-converter-load possesses nonlinear behavior due to the varying environmental conditions and the boundaries of photovoltaic generator versus battery state of charge, as revealed from an analysis of small-signal equations for possible unstable condition. It was shown that system constrains consequence in a complicated control task where standard controller of an inverse plant is insufficient to stabilize the system. Then a proportional integral controller is implemented. However, it is shown that varying closed-loop performance from over-damped to under-damped, depending on the operating point. Eventually utilizing a robust disturbance observer controller reveals that closed-loop performance remains nearly nominal throughout the entire operation range.
关键词： Microgrid,Disturbance observer,Photovoltaic generator,Robust control,PV,Buck converter
更新于2025-09-19 17:13:59
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Adaptive Backstepping-based H∞ Robust con-troller for Photovoltaic Grid-connected Inverter
摘要： To improve the robustness and stability of the photovoltaic grid-connected inverter system, a nonlinear backstepping-based H∞ controller is proposed. A generic dynamical model of grid-connected inverters is built with the consideration of uncertain parameters and external disturbances that cannot be accurately measured. According to this, the backstepping H∞ controller is designed by combining techniques of adaptive backstepping control and L2-gain robust control. The Lyapunov function is used to design the backstepping controller, and the dissipative inequality is recursively designed. The storage functions of the DC capacitor voltage and grid current are constructed, respectively, and the nonlinear H∞ controller and the parameter update law are obtained. Experimental results show that the proposed controller has the advantage of strong robustness to parameter variations and external disturbances. The proposed controller can also accurately track the references to meet the requirements of high-performance control of grid-connected inverters.
关键词： grid-connected inverter,L2-gain robust control,adaptive backstepping control,Robustness,H∞ controller
更新于2025-09-12 10:27:22
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Robust maximum power point tracking of photovoltaic generators based on real-time dynamic conductance estimation
摘要： In this paper, an innovative approach aimed to robustify maximum power point tracking, intended for managing a photovoltaic generator is presented. The method exploits the bond between photovoltaic generator static and dynamic conductance, utilizing their sum as the base controller management mutable data of the maximum power point tracking loop. Environmental condition and operating point are the significant variables that influence dynamic and static conductance values, consequently, when using a controller which design to a single nominal operation point a nominal response is un-achievable, thus, system response can vary from overdamped to underdamped. Notwithstanding, dynamic and static conductance sum calculation always yield zero when the photovoltaic generator operates at the maximum power point. Therefore, forcing the sum to zero drives the system to be at maximum power point no matter the states of the environmental conditions. Uneven and variable response time calls for implementing a disturbance observer as a counteraction to the nonlinear maximum power point tracking loop regulation variables, operation point, and environmental condition variations. Test results of implanting disturbance observer revealing a unified and nominal response all over the operation range, therefore the proposed approach enhanced and robustified the common integral controller.
关键词： Maximum power point tracking,Renewable energy generators,Dynamic conductance,Robust control
更新于2025-09-12 10:27:22
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A New Approach to H-Infinity Control for Grid-Connected Inverters in Photovoltaic Generation Systems
摘要： The present study investigates the stability problem of the grid-connected inverters (GCIs) for possible variations in grid impedance. A new type of H1 control method is proposed for the current control loop of inverters, where the third weighting function is determined using the game theory. The proposed method is applied to the GCI in a photovoltaic system and its response to variations in grid impedance is investigated. Computer simulations conducted for comparison of H1 and PI controller indicate the effectiveness of the proposed control algorithm. Simulation results also show that the proposed algorithm significantly outperforms the PI controller under the conditions of varying grid impedance.
关键词： solar energy,photovoltaic power generation,robust control,power electronics,grid-connected inverters,weighting function,game theory,H-in?nity control
更新于2025-09-11 14:15:04
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018 –ECCE Asia) - Niigata, Japan (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - Coordinated DFIG Wind Turbines and Solar PV Generators for Inter-area Oscillation Damping
摘要： Intermittent power injection from renewable energy sources such as wind and solar farms may cause low damping of critical inter-area oscillation modes. However, such renewable sources may be located in some areas with higher controllability of inter-area oscillations than the conventional synchronous generators. By controlling the reactive power output of such renewable sources, the superior damping effect of inter-area oscillations can be anticipated. This paper proposes the robust control design of power oscillation dampers of wind turbines with doubly-fed induction generator and solar photovoltaic generators to damp inter-area oscillations in large-scale power systems. The coordinated robust controllers are designed to achieve the desired damping and robustly operate against system uncertainties such as noises, external disturbance, and intermittent power. Study results indicate that the damping effect of coordinated wind and solar farms is higher than that of conventional power system stabilizers under various operating conditions.
关键词： DFIG,robust control,inter-area oscillation,power oscillation damper,SPV
更新于2025-09-09 09:28:46
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Desired Compensation Adaptive Robust Control of Electrical-optical Gyro-stabilized Platform with Continuous Friction Compensation Using Modified LuGre Model
摘要： Continuous friction compensation along with other modeling uncertainties is concerned in this paper, to result in a continuous control input, which is more suitable for controller implementation. To accomplish this control task, a novel continuously differentiable nonlinear friction model is synthesized by modifying the traditional piecewise continuous LuGre model, then a desired compensation version of the adaptive robust controller is proposed for precise tracking control of electrical-optical gyro-stabilized platform systems. As a result, the adaptive compensation and the regressor in the proposed controller will depend on the desired trajectory and on-line parameter estimates only. Hence, the effect of measurement noise can be reduced and then high control performance can be expected. Furthermore, the proposed controller theoretically guarantees an asymptotic output tracking performance even in the presence of modeling uncertainties. Extensively comparative experimental results are obtained to verify the effectiveness of the proposed control strategy.
关键词： three-axis electrical-optical gyro-stabilized platform (TEOGSP),desired compensation friction compensation,Adaptive robust control
更新于2025-09-04 15:30:14